I could not find a D or E rated tire for my Expy due to the 20" wheel size. The only available tire in that high rating was an offroad Wrangler and frankly I did not like the look, nor would I wont the road noise. When I replaced the Scorpions that were on my Expy, I put on the heaviest load rating tires I could find in my size, Nexen Roadian 275/55/20 XL. At 2,833# rating at 50# pressure I could find nothing else that comes close. I looked at Michelins and Yokohama and the load ratings were less.
I ran my first set of tires to 60,000 miles and had them worn almost to the wear bars when I replaced them with an identical set. I researched tires again and could find nothing else that compared. To top it all off, price installed was significantly lower than anything else quoted.
As stated earlier, wind can still be an issue regardless. Yes these tires are more solid than the Pirelli tires that came with the vehicle, but at times I still wish I had a more solid platform. . I cannot afford to get another TV though. Good luck with whatever you decide.